The 5-Second Trick For BBO Crystal
The 5-Second Trick For BBO Crystal
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These raw resources are cautiously measured and blended in specific proportions to ensure the exceptional composition with the resulting crystals.
The choice in the most fitted crystal material for the provided software is usually significantly from trivial; it ought to contain the thought of numerous factors. For example, a higher nonlinearity for frequency conversion of ultrashort pulses does not aid In case the interaction duration is strongly confined by a significant group velocity mismatch along with the low damage threshold limitations the relevant optical intensities.
Regular cleansing and proper storage can assist increase the lifespan of BBO crystals, making certain their continued contribution to the field of optics and photonics.
Figure 23: This diagram illustrates a beam's focal region in a very uniaxial birefringent product. Straight lines, representing rays, are drawn through the center on the beam midsection. Because the beam diverges with the beam waistline, the Power within the beam is distributed more than a bigger cross sectional place.
BBO is of individual value inside the obvious and far UV. Lots of stage-matching apps are doable, including the subsequent:
On the other hand, to completely make the most of the possible of BBO crystals, it can be vital to understand their Attributes and the way to handle and retailer them adequately. These crystals have to have thorough managing to circumvent damage to their surfaces and may be stored in a very dry, interesting area to keep up their optical general performance.
A recommended guideline for focusing femtosecond laser pulses right into a nonlinear crystal is to take care of a Rayleigh selection that is not less than quite a few occasions more time compared to the duration from the SHG crystal. This minimizes the prospect of harming the crystal, and cuts down the negative results of spatial phase mismatch and spatial (Poynting vector) wander-off.
Cleaning BBO crystals is a delicate method that needs care to stay away from harmful the crystal’s surface. A comfortable cloth or lens tissue moistened that has a moderate solvent, which include isopropyl alcohol, can be used to Carefully wipe the floor on the crystal.
Beam diameter is usually imperative that you know when evaluating destruction thresholds. When the LIDT, when expressed in models of J/cm², scales independently of spot sizing; huge beam dimensions usually tend to illuminate a larger variety of defects which can cause increased variances from the LIDT [4].
GWU-Lasertechnik offers all common nonlinear crystals like LBO, BBO and KTP with a wide assortment of read more specs. Beside the nicely-founded supplies, ground breaking crystals like CLBO or BiBO with fantastic Attributes for e. g. deep-UV era or superior-electrical power ultrashort pulse lasers are available. Irrespective of if personal parts for R & D functions are expected or Price tag-efficient numbers in small, medium or significant batches with in-time shipping and delivery for that creation line are necessary: GWU’s committed company helps you to locate the most effective core elements on your software.
The 4 reduced figures illustrate that the group velocity delay (temporal wander-off) increases as being the pulses propagate via the fabric. The temporal walk-off is illustrated for distances Z0 through Z3, which are indicated within the diagram at major.
BBO nonlinear crystal is really a damaging uniaxial crystal. It provides phase matching for various second-get interactions Nearly over its complete transparency range. This transparency ranges from 185 nm to 3.3 µm, as inferred from transmittance measurements employing crystal samples of a few mm thickness.
The wavelength of The sunshine utilised along with the angle at which it enters the crystal can also effect the crystal’s general performance. Suitable alignment and managing of the crystal are crucial to obtaining exceptional performance.
flux-developed KTP and RTP with its superior nonlinearity, also in variants with superior grey tracking resistance